Relativistic reverberation has been observed in several AGN, where delayscomparable to the light crossing time very close to the black hole are seenbetween the Fe K line and the continuum. If this interpretation is correct,objects with no reflection should show no relativistic reverberation. Continuumlags however, are expected to be present regardless of reflection. The latterhave been attributed to either Comptonization, propagating fluctuations orscattering. Here, we request a 120 ks observation of PG 1448+273 that shows nosigns of reflection to directly test these predictions and constrain thecontinuum lags. The absence of reflection will allow us to isolate the continuumlags and understand their origin, providing unprecedented constraints on the X-ray source and the reflector.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2017-01-24T05:52:43Z/2017-01-25T16:52:43Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Dr Abderahmen Zoghbi, 2018, 'Investigating Time Lags In AGN In The Absence Of Reflection', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-o6um770
